linux-kernel - Re: [RFC][PATCH 0/5] preempt

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Message-ID: <20130814165505.GB21191@laptop.programming.kicks-ass.net>
Date:	Wed, 14 Aug 2013 18:55:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>, Peter Anvin <hpa@...or.com>,
	Mike Galbraith <bitbucket@...ine.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [RFC][PATCH 0/5] preempt_count rework

On Wed, Aug 14, 2013 at 09:48:27AM -0700, Andi Kleen wrote:

> FWIW I removed the user_schedule in v2 because I don't need it anymore.
> Feel free to pick it up from v1 though.

Ah, I had a quick look through your v2 because I got a link into it from
Ingo but didn't find it. I'll have to ask Google to locate this v1. I
suppose that's what's wrong with my last patch. It directly does a call
preempt_schedule -- which I had hoped would work due to its asmlinkage,
but apparently there's more to it.

Also, I suppose there's a few volatile thingies missing.
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